A side note about Gibson acoustics. It seems to me the quality coming out of the Montana factory has literally skyrocketed in the last 2 or 3 years. I also ordered an L-00 at the same time as the J-45 just so I could compare the two. Sonically they were very similar, with the L-00 being lighter on the bass as you would expect, so back it went as well.
A few years back - like 5 or 6 years ago - I was on another hunt for a Gibby, but everything I tried sounded dead and lifeless. And I tried a bunch of them from Hummingbirds to parlours. I don't know what changed, but they have def upped their game quality-wise. While at NAMM this year I got to play a Lefty Hummingbird; Hummingbird studio; L-00 studio; SJ-200 studio; and another J-45 non-Studio. Wasn't too impressed with the Studio series. They are good guitars, but don't quite have that classic Gibson chime I look for. Had the wife play about 6 righty models so she could see what all the fuss was about. Now she gets it lol.
If you ever get to play a J-45 made with horse-hide glue on the bracing and/or back and sides, you'll notice a huge difference in the tone. But good luck finding a lefty one, I never have. I've only messed with righty's on occasion. You could probably order one made that way but its a very spendy option last time I looked.
Lastly, if you (or anyone) do plan on spending $$$ on a high end acoustic, I'd wait for Sweetwater's summer time Yellow Tag sale. You can negotiate killer prices with them. That's how I got the J-45